#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
void test_bool()
{
    cout << boolalpha << true << bool(1) << endl;
}
void test_jinz()
{
    cout << showbase << scientific << showpoint << setw(22) << left << setfill('f');
    cout << exp(20.0) << " " << sqrt(12) << endl;
    cout << oct << sin(20) << " " << tan(1024) << endl;
    cout << hex << cos(20) << " " << log(1024) << endl;
    cout << dec << log10(189) << " " << atan(1024) << endl;
}
int main(int argc, char const *argv[])
{
    // test_bool();
    test_jinz();
    return 0;
}
